Wireless thermostat installation

LE

My current wireless thermostat system died on me over the summer and now it's getting towards winter I decided to replace it. The last time I had a gas man out he told me they were really easy to fix, by simply whacking out the existing wiring matrix and having it slot directly into the new receiver. However, the wiring matrix looks like this:

The new receiver, however, looks like this:

So I figure I need to match the five wires to the five holes.

It's been a while since I wired up anything, let alone a heating system, so I could do with some pointers. The top row of three holes, left to right, are Heating On signal, Live In, Heating Off signal. The bottom two are neutral and live.

I'm a little confused as to the difference between live and live-in, or why they're bridged by default. I'm assuming as I have a five-wire setup in the original it'll be the same for the new one and I need to remove the bridge, but then where does my current live go, and what goes in the other live hole? Earth? Also, which are the two signal wires? I assume blue and yellow, but which way around?

Help would be appreciated! Electric shocks and my house blowing up would not.

Cheers

BrunoNoMedals: Watery-eyed dealer of paperwork.

swordman said:

The Company never came out of action until they reached Bremen. The only time we lost contact with the enemy was when they ran faster that we could catch them.

LE

My current wireless thermostat system died on me over the summer and now it's getting towards winter I decided to replace it. The last time I had a gas man out he told me they were really easy to fix, by simply whacking out the existing wiring matrix and having it slot directly into the new receiver. However, the wiring matrix looks like this:

It's been a while since I wired up anything, let alone a heating system, so I could do with some pointers. The top row of three holes, left to right, are Heating On signal, Live In, Heating Off signal. The bottom two are neutral and live.

I'm a little confused as to the difference between live and live-in, or why they're bridged by default. I'm assuming as I have a five-wire setup in the original it'll be the same for the new one and I need to remove the bridge, but then where does my current live go, and what goes in the other live hole? Earth? Also, which are the two signal wires? I assume blue and yellow, but which way around?

Help would be appreciated! Electric shocks and my house blowing up would not.

Pick a card double it divide by 2, then look at the card you first thought of and add that to the number. Assign each colored wire a number then with your eyes shut tight pop one wire into each hole and so on, tighten up and switch the power back on

Winner of 5 Gold Medals in the 2012 Arrselympics
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LE

Guessing this, but the fact the red cable on the new case is taped on one side, suggests it is not connected and therefore you can open up the case. There appear to be two wiring diagrams showing, but can't make them out.

LE

Lets start with the easy one. Yellow/green is Earth. I cannot see where that connects on your photo of your new one.

Next, Red is Live. Fit it in one of the terminals where the bridging wire is. Do not remove the bridge.

Black is Neutral. Simples.

The remaining two are Switched Live. I don't know which is which, and you have a 50/50 chance of getting it right. If you get it wrong, it will not cause any harm, it just won't work properly. Fit them, power it up, cycle the thermostat, and see if the heating goes on and off as you expect. If it doesn't, swap these two wires, and test again.

LE

The earth is the problem. Seeing as it's connected in the original, I'd expect it to be connected in the new one. I can place all the other cables, but have no idea what to do with the earth. If I removed the live bridge, would the earth go in one of those terminals?

BrunoNoMedals: Watery-eyed dealer of paperwork.

swordman said:

The Company never came out of action until they reached Bremen. The only time we lost contact with the enemy was when they ran faster that we could catch them.

LE

Well I've got it all sorted and it seems to be connected up fine (i.e. I'm still alive and the house hasn't burned down). However, there is one small issue which I can't work out.

When I turn up the thermostat it sends out a signal to the receiver, which successfully receives it (green light comes on), the burner kicks in and the boiler goes from dormant mode ("0" on the LED display) to central heating mode ("c" on the display).

When I turn the thermostat back down the receiver successfully gets that signal, and the green light goes off. The burner goes off on the boiler, but it stays in central heating mode. I would expect the display to change from 0 to c, but it doesn't happen.

The fact that the burner goes off tells me the boiler is receiving the right signal from the wires coming out of the receiver. However, I don't know why it doesn't just go to sleep properly.

Maybe I'm just not giving the boiler long enough to settle after the signal goes through. I'll dig through the manuals again and see if I'm missing anything, but if anyone's got an idea in the mean time I'd love to hear it.

BrunoNoMedals: Watery-eyed dealer of paperwork.

swordman said:

The Company never came out of action until they reached Bremen. The only time we lost contact with the enemy was when they ran faster that we could catch them.